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Issue:
Design and analysis of 4-20mA circuit based on PWM
Author(s):
QIN Jian
,
TAN Yan-liang
Pages:
64
-
66,70
Year:
2014
Issue:
5
Journal:
Information Technology
Keyword:
circuit design
;
4-20 mA current
;
signal converter
;
Abstract:
介绍了基于PWM波的4-20mA信号的转换原理,在此基础上设计了由光耦,N沟道场效应管和TL431稳压芯片等元件组成的信号转换电路,并对电路进行了理论分析,对电路创新点进行了详实说明.由电路仿真得到的数据和图像分析表明该设计方案提高了信号控制的精度和稳定性,该电路结构精巧成本廉价,可广泛适用于多种自动化仪表的信号处理中.
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